I have never had to fit or use snow chains. In anticipation of the heavy snowfall I would have to drive through on I-80 at Donner Pass, I ordered them and unfortunately didn't have time to test them. So the ultimate test was when the cops pulled me off the road at exit 1 in Reno and I had to put them on. Having read this before the trip I had a good idea of what they were like. SHOULD keep going, and of course they did! They fit right out of the box, stayed nice and tight and provided excellent traction on my 2008 Charger during a snow storm when road conditions caused many 4x4 trucks to pull off my left and right in heavy snow. banks. After four and a half hours of non-stop driving through snow, ice, mud, mud and concrete, they were still secure, came off easily, and cleaned like new as soon as I got them home. I am admittedly the biggest pessimist, aerospace inspector who suspects and searches for something "wrong" and I was very pleased and would recommend this product.